Zinc alloy



UNITED STATES PATENT OFFICE.

HANS GOLDSCHMIDT AND KARL MI j'LLER, OF ESSEN, GERMANY, ASSIGNORS, BY MESNE ASSIGNMENTS, TO THE CHEMICAL FOUNDATION, INC., A CORPORATION To all "who/11 it may concern:

Be it known that we, HANS GoLnsoHMIDT be a full, clear, and exact description of the same.

In recent times it has been tried to re.- place white-metal for bearings as well as red-brass by alloys which contain besides zinc in the main more or less tin (up to 20 per cent.) and small amounts of .copper, lead and aluminum. I

our invention refers to zinc alloys free of tin which can be used as a substitute for the above named metals. It has been found that for the purpose mentioned zinc alloys are useful which contain about 90 per cent. of zinc and copper, lead and aluminum in varying proportions without any addition of tin. Moreover we have found that by adding manganese as a further constituent alloys are obtainable which can be cast and worked without any difficulty and which owing to their favorable mechanical properties are eminently useful for bearings, fittings, fuses and the like. Ofspecial value in practice has proved an alloy containing about 6 per cent. of copper, 2 per cent. of aluminum and 1.5 per cent. of manganese besides zinc.

Of course the proportions of the com- Application filed April 19, 1917, Serial No. 163,263.

OF DELA- Patented May 4, 192Q.

WARE.

} ZINC ALLOY.

- 338 82 Specification of Letters Iatent.

No Drawing.

ponent parts may be varied Within certain limits, in practical use it is preferred adding not more than 4 per cent. and not less than 0.25 per cent. of manganese.

A haracteristic feature of this new alloy -is that it is without any tin and furthermore that it contains a small amount of manganese.

What we claim is: v 1. An alloy containing zinc, and from about one-quarter of one (.25) per cent.

to about four (4:) per cent. of manganese,

and at least six and nine-tenths (6.9) per cent. of copper and aluminum together, the

copper and aluminum being present in the ratio of, about three parts of copper to about one part of aluminum.

2. An alloy of zinc with copper, aluminum and manganese, said alloy containing about 90 per cent. of zinc and an amount of manganese not less than about 0.25 per cent,

'and not more than about 4 per cent.

3. An alloy of zinc with copper, aluminum and manganese, said alloy containing zinc, about 6 per cent. of copper, about 2.

per cent. of aluminum and about 1.5 per cent. of manganese.

In testimony whereof we have. signed our names to this specification in the presence of two subscribing Witnesses.

HANS GOLDSGHMIDT. KARL MULLER. Witnesses FRANCES NUTER, FREDERICK J. DIETZMAN. 

